Master compatibility indicator faulty

In 3404, the master incompatibility indicator doesn’t work correctly. If I remove a point in one layer, the warning doesn’t show up, although the layers are now incompatible. At some point, the warning is shown, but doesn’t disappear when the layers are made compatible again. I need to reopen the file to trigger the correct behaviour. Anybody else experiencing this?

Something very weird is going on. These layers are not compatible (rounded corners in one master, not in the others):

This should be fixed in 3405.